Improvement in apparatus for preventing rapping noise in machinery



oise in Machinery PatentedMay 27,1873,

a. Xmas. {Apparatus far Preventing Rapping N AM. Pnoro-umumllilc m Mmsaamva's mam-SJ from a series of cams on a rotating shaft. The

annoyance, and the object of said invention is UNITED STATES PATENT Orrrcn.

GUSTAVUS AMES, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN APPARATUS FOR PREVENTING RAPPING NOISE IN MACHINERY.

Specification forming part of Letters Patent No. 139,227, dated May 27, 1873; application filed February 5, 1873.

To all whom it may concern:

Be it known that I, GUSTAVUS Arms, of Rochester, in the State of New York, have invented a certain Improvement in an Apparatus for Preventing Rapping Noise in Machinery for Making Paper,which is applicable to other machinery, of which the following is a description, reference being had to the accompanying drawing making part of this specification, in which- Figure 1 is a vertical section of my improvement.

In machinery for making paper the screen'- plates are composed of sheet metal with narrow slots, through which the pulp mustpass on the way to the vellum or wiregauze on which the paper is formed. The said screenplates receive a rapid shaking motion, received rapid lifting and dropping of the rod and lent tappets a surrounding case containing case to prevent waste. The. liquid thus interthe cam-wheel effectually avoids the rapping noise heretofore experienced.

used because I have found that the most efficient liquid for the purpose, although other he used--one at each side of the frame; and although I have above described my said; invention, as applied to the vibrating screwof a machine for making paper, I do not wish to be understood as limiting my claim of in: vention to such machinery, as it will be obvinoise produced thereby is a source of serious to avoid such rapping noise.

In the accompanymg drawing, or represents the frame, which carries the screen-plates b, on which the pulp is delivered to be screened that none but the fine pulp may pass to the vellum or wiregauze to be made into paper. This frame is hinged at c to the main frame (1, and its opposite end drawn down by a spring, a, or equivalent means; and it is provided with a vertical rod, f, the lower end of which rests on the periphery of a cam-wheel, g, on a shaft, h, which receives a rotary motion from some suitable motor. The periphery of the camwheel g is formed with a series of cams, t,

produce disagreeable noise. to secure by Letters Patent, is-

alent liquid, in combination with the vibrating frame and cam-wheel,substantiallyas and for the purpose specified.

GUSTAVUS AMES.

Witnesses: I

JOHN CLARK, J r.,

Isaac F. BULIFFERN;

which gradually lift the rod f and frame a and permit them to drop quickly.

Now, to avoid the noise resulting from the a frame with lts screen-plate, I combinewith the screen-frame and rotating cam orequiva- I liquid tar or equivalent liquid, the rod f passing through a suitable hole in the cover of the posed between the lower end of the rod f and I have named liquid tar as the liquid to be A liquids (such as oil) will answer a good purse. Instead of one, two such apparatuses may one that the same thing may be applied to anykind of machinery where the rapping of parts What I claim as my invention, and desire The case for containing liquid tar or equiv- 

